... and it turns out, the errors are being caused by Logitech. It seems Logitech servers have been having issues for the last hours/days. So, it is impossible currently to operate any cfg change to my remote.

On their forums, users are quite unhappy. Including myself.

I don't like that the harmony control software depends entirely on Logitech servers (--> the Internet) to work. So silly. Leaving aside the inconvenience this causes to users, what benefit is there for Logitech? What am I missing?